public function detail(Application $app, Request $request, $id)
    {
        $BaseInfo = $app['eccube.repository.base_info']->get();
        if ($BaseInfo->getNostockHidden() === Constant::ENABLED) {
            $app['orm.em']->getFilters()->enable('nostock_hidden');
        }

        /* @var $Product \Eccube\Entity\Product */
        $Product = $app['eccube.repository.product']->get($id); // ここのgetメソッド
 }

    /**
     * get Product.
     *
     * @param  integer $productId
     * @return \Eccube\Entity\Product
     *
     * @throws NotFoundHttpException
     */
    public function get($productId)
    {
        // Product
        try {
            $qb = $this->createQueryBuilder('p');
            $qb->addSelect(array('pc', 'cc1', 'cc2', 'pi', 'ps'))
                ->innerJoin('p.ProductClasses', 'pc')
                ->leftJoin('pc.ClassCategory1', 'cc1')
                ->leftJoin('pc.ClassCategory2', 'cc2')
                ->leftJoin('p.ProductImage', 'pi')
                ->innerJoin('pc.ProductStock', 'ps')
                ->where('p.id = :id')
                ->orderBy('cc1.rank', 'DESC')
                ->addOrderBy('cc2.rank', 'DESC');

            $product = $qb
                ->getQuery()
                ->setParameters(array(
                    'id' => $productId,
                ))
                ->getSingleResult();
        } catch (NoResultException $e) {
            throw new NotFoundHttpException();
        }

        return $product;
    }